Shu is the god of air. He and his consort/twin of Tefnut were the first divine couple created. They were either created by either Atum, or are the children of Ra, usually without a goddess' help, though sometimes Hathor is listed as their mother. He keeps his children, Nut and Geb, separated from one another by standing on Geb and holding Nut above his head.
In art, Shu appears as a man wearing a feather on his head, sometimes holding a scepter in one hand. He usually appears with the four pillars of the sky near his head and holding his hands aloft to keep Geb and Nut separated.